Stamp-mill.



110,334,828; y I PATENTEDJUL? 28,1903...

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STAMP MILL. APPLICATION TILED SEPT. 12. 1902.

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No. 734,828. PATENIED JULY 28,: 1903..

'w. A. DALTON.

STAMP MILL.

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UNITED STATES Patented July 28, 1 903.

PATENT OFFICE.

STAMP-MILL.

SPECIFICATION forming part of Letters Patent No. 734,828, dated July 28, 1903. Application filed September 12, 1902. Serial No. 123,141. (No model.)

T0 at whom it may concern:

Be it known that I, WINNALL A. DALTON, a citizen of the United States, residing at Tueson, in the county of Pima, Arizona Territory, have invented certain new and useful Improvements in Stamp-Mills, of which the following is a specification.

This invention relates to certain new and useful improvements in stamp-mills; and it has for its objects, among others, to provide a simple and cheap device of this character possessing great crushing capacity, requiring much less power and weight of stamp for an equal crushing capacity, and also to so construct and dispose the parts as to insure great compactness.

Another object is to provide for the ready regulation of the drop of the stamp as may be required; further, \to provide'the crank-shaft with a double throw, thereby causing the reaction on the springs; also, to so connect the upper end of the stamp-stem with the crosshead as to permit said stem to revolve while in action. The cranks are arranged on the shaft so as to act alternately, so that while one is down the other is up, thus balancing each other. The springs are so disposed that the throw of the crank connecting thereon with the stamps hung to them by means of flexible connections produces a reaction, throwing the stamp with great force against the die-the greater the speed the greater the force of the blow.

The mill may be arranged in batteries of one, two, three, four, or more stamps, as may be desired, without alteration of the parts other than changing the relative positions of some of them.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the appended claims.

The invention in its preferred form is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in WhlCl1- Figure 1 is a front elevation of my improved stampmill. Fig. 2 is a side elevation thereof. Fig. 3 is a detail of the sprocket-Wheel and its screw-shaft and the pinions engaging therewith. Fig. 4 is a horizontal section through Fig. 1. Fig. 5 is a horizontal section taken on a plane just above the screwshaft in Fig. 1. Fig. 6 is a detail showing the manner of connecting the spring with the turnbuckle and with the flexible connection. Fig. '7 is a detail View to illustrate the hearing between the stamp-stems and cross-heads, the top plate being removed.

Like numerals of reference indicate like parts throughout the several views.

Referring now to the details of the drawings by numeral, 1 designates a crank-shaft; 2, a driving-pulley thereon; 3, the crankshaft bearings; 4, crank -collars; 5, the battery-posts, at the upper ends of which the crank-shaft bearings 3 are mounted.

6 is the base, and 7 the mortar.

8 designates the dies of ordinary construction, and 9 designatestheinside copper plates for amalgamating, supported in any of the well-known ways.

10 designates the screens, also of wellknown construction and use.

Connected with the cranks 11 are the right and left adjusting-screws 12 and 13, which are engaged by the turnbuckles 14, provided with the jam-nuts 15.

16 designates the clamp-plates connected with the lower screws, and they serve the purpose of bolting the springs 17 to the lowermost adjusting-screw. The springs 17 are semi-elliptical in form, as seen clearly in Fig. 2, disposed with their central or arched portion uppermost and their lower ends connected with suitable plates or fastenings 18, to which are attached the connections 19, of leather belting or other suitable flexible material.

20 represents the cross-heads, which are mounted to slide in the guides 21, secured to the battery-posts 5, and the upper end of each cross-head is secured by suitable clamping plates and bolts 22 to the adjacent ends of the flexible connections 19, as shown best in.

Fig. 1. V l

23 represents the stamp-stems suitably secured to the cross-heads, while 2% represents the stamp-shoes and boss combined.

25 represents long keys which are adapted to engage in slots or keyways 26 in the stampstems.

27 is a transverse screw on key or shaft 25,

which is mounted in suitable hearings in the battery-posts and adapted to turn the screwpinions 28, with which it engages. On the extended end of the shaft 27 is a sprocket- Wheel 29, over which passes asprocket-chain 30,which passes also around another sprocket- Wheel 31 on the extended end of the crankshaft 1. WVhile I have chosen this instance to show the connection between the screwshaft 27 and the crank-shaft 1 as a sprocket wheeland chain connection, it is evident that this is not essential and that any of the suitable forms of connection may be employed such, for instance, as bevel-gearing and suitable connecting-shafting.

32 designates the feed spout or entrance of usual construction. The stamp-stems are passed each through the center of a screwpinion and by means of the keys 25, firmly set into the stamp-stems, and corresponding slots or keyways in the screw-pinions the stamp is made to revolve with the screwpinion as the latter is turned by the screwshaft connected to the main crank-shaft l and deriving its motion therefrom, as will be readily understood. This mortar will admit of eight copper plates for inside amalgamation and is provided with four discharges with a large amount of screen area. Each crank may have a throw of two or more inches, as may be required, and as each crank has its own adjusting mechanism to which the reacting springs are connected and the ends of each of such springs being connected by the flexible connections above described and suitable fastenings the tendency is also to pull in the ends of the springs, so that they may react in response to the throw of the cranks. The cross-heads are guided in their vertical movement by the guide-plates attached to the inner faces of the batteryposts, so that the cross-heads always move in perfect alinement. The upper end of each stamp-stem is fastened to its cross-head in such manner as to permit it to revolve while in action, and the lower end of the stampstem is fitted into the stamp-shoe with a slight taper, so as to tighten when it strikes the die.

Theadjusting-screw and turnbuckle are provided for the purpose of letting down the stamp as the shoe and die wear, thereby regulating the drop of the same as maybe required.

From the above it will be seen that I have devised a novel, cheap, and eflicient form of stamp-mill, and while the structural embodiment of the invention as herein disclosed is what I at the present time consider the preferable one it is evident that the same is subject to changes, variations, and modifications without departing from the spirit of the invention or sacrificing any of its advantages, and I therefore do not wish to be restricted to the details of construction herein disclosed, but reserve the right to make such changes, variations, and modifications as come properly within the scope of the protection prayed.

What I claim as new is- 1. In a stamp-mill, driving means, comprising in combination, a connecting-rod adjustably clamped to a bowed spring carrying at its outer ends flexible members attached to a cross-head in which is revolubly mounted a stamp-stem, a cross-head, a bowed spring, flexible connections between the ends thereof and the cross-head, and a crank-shaft connected with said spring, and means for adjusting the connection between the spring and the crank-shaft, and means for rotating the stamp-stem, said means for rotating the stam p-stems,consistin g of vertical worm-gears on the stems, and a horizontal worm engaging said gears, the worm being driven by the crank-shaft.

2. In a stamp-mill, driving means, comprising in combination, a connecting-rod adjustably clamped to a bowed spring carrying at its outer ends flexible members attached to a cross-head in which is revolubly mounted a stamp-stem, a cross-head, a bowed spring, flexible connections between the ends thereof and the cross-head, and a crank-shaft connected with said spring, and means for adjusting the connection between the spring and crank-shaft, and means for rotating the stamp-shaft and operative connection between said rotating means and the crankshaft, said means for rotating the stampstems, consisting of vertical worm-gears on the stems, and a horizontal worm engaging said gears, the worm being driven by the crank-shaft.

3. In a stamp-mill, the combination of a base,battery-posts rising therefron1,a cranked driving-shaft mounted in said posts, springs connected with the cranks of said shaft,stampstems revolubly connected with said springs, a worm-gear on said stems and a worm-shaft engaging said gears to rotate said stems.

4. A stamp-mill consisting of a base, a mortar thereon, dies arranged in said mortar, stems carrying stamp-shoes, battery-posts rising from the base, guides on said posts, crossheads arranged to move in said guides, and revolubly connected to the stems, a cranked driving-shaft and springs connected with the driving-shaft and cross-heads.

In testimony whereof I affix my signature in presence of two witnesses.

WINNALL A. DALTON.

Witnesses:

J. W. RoNsTADT, R. RONSTADT. 

